A supervirus threatens to wipe out the human population.
The only hope for the future is a cure hidden inside Ryder Stone. Created in a lab and brutalized, betrayed and hated by humans, Ryder yearns for freedom. On the outside, a group of human genetic purists want him dead.
When Katie Marsh, a brilliant young geneticist, discovers his secret, she must fight to protect Ryder, gain his trust...and convince him to save humanity before the purists destroy them both.
